fix: Dedupe track collaborators

[raymondjacobson]

Summary

• Deduplicate collaborator artists before rendering track artist bylines, excluding the track owner from the extra artist list.
• Deduplicate accepted and pending collaborators when preparing edit metadata and when serializing collaborator IDs for upload.
• Add regression coverage for duplicate collaborator display and upload mapping.

API-side note

The API/indexer should ideally also enforce collaborator uniqueness at the write or read boundary so clients do not receive duplicated users. This client-side guard is still useful because it protects current web surfaces from any already-indexed, cached, or malformed collaborator payloads.

Testing

• npm run test -w @audius/common -- src/adapters/track.test.ts --run
• npm run test -w @audius/web -- src/components/link/TrackArtists.test.tsx --run
• npm run lint -w @audius/web -- src/components/link/TrackArtists.tsx src/components/link/TrackArtists.test.tsx
• cd packages/common && npx eslint src/adapters/track.ts src/adapters/track.test.ts
• git diff --check

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Latest commit: 54926c0

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